锡铅合金的热型连铸  

Heated mold Continuous Casting of Tin lead Alloy

作　　者：黎沃光[1] 余业球[1] 王德芳[1] 

机构地区：[1]广东工业大学

出　　处：《铸造技术》1997年第5期42-44,共3页Foundry Technology

摘　　要：热型连铸Ｓｎ４０％Ｐｂ时，用连续测温方法测定铸型出口处不同温度下的型内温度分布。由此求得固＋液区的长度、位置和温度梯度等数据。发现随着铸型温度的提高，固＋液区变短并向型出口移动；温度低于２１６℃时，由于固＋液区长而形成热裂，高于此温度热裂消除并获得光洁表面；温度梯度大于０．３９℃／ｍｍ时实现等轴晶向柱状晶的转变。Continuous temperature measuring was employed in Sn-40%Pb alloy Heated mold continuous casting process to obtain temperature distribution inside the mold under various mold temperature. Data of the lengths and positions of the solid+liquid zone, and temperature gradients were derived from the temperature curves. It was found that lower mold temperature results in hot tear due to long solid+liquid zone, with increasing mold temperature, solid+liquid zone is getting short and moving toward the mold exit, when mold temperature reaches 216 ℃, hot tear is removed, shining surface is obtained at 220 ℃, equiaxed to columnar transition occurs when temperature gradient is higher than 0.39 ℃/mm.

关 键 词：热型连铸 锡铅合金 凝固 铸型温度 

分 类 号：TG291[金属学及工艺—铸造] TG249.7